Fig. 4: The applications of the multi-energy X-ray detector.
From: Vertical matrix perovskite X-ray detector for effective multi-energy discrimination
a The reconstructed X-ray spectra obtained from the response signals of the detector, and the simulated X-ray spectra by Monte Carlo, when the driving voltages of the X-ray tube are 45, 55, 65 kVp. b Schematic diagram of multi-energy X-ray imaging. The X-ray energy from low to high is represented by the color from red to purple. The dark-blue lines represent high-density substance, yellow-green rectangles represent medium-density substance and orange balls represent low-density substance. c The image of our artificial sample from 2nd electrode. d The image from 5th electrode. The inset is the optical photo of the sample. e The subtracted pseudocolor image for high-density substance CaCO3 tablet. f The subtracted image obtained for the low-density paraffin ‘H’ letter. The pixel size in c–f is 0.85 mm
